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    <title>Document</title>
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    <script src="../node_modules/@vue/reactivity/dist/reactivity.global.js"></script>
    <script>
        let { reactive, shallowReactive, readonly, shallowReadonly } = VueReactivity
        let state = shallowReadonly({ name: 'zf', age: { n: 12 } })
        state.age.n = 100;
        console.log()
    </script>
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